"Son, you have a panty on your head."
I KNEW it would get posted! LOLOL!!!
Edmund Waller had a poem on that:
“That which her slender waist confin’d,
Shall now my joyful temples bind”
The mask is not for your protection; it is for the protection of those around you. Other people wearing a mask is for your protection. If someone coughs or sneezes in this scenario it travels less than an inch and not 6 ft.
It is a social contract. This is why a scarf, etc. will work as well.
If you are dealing with unmasked infected people, then you need an N95 or N99 mask and eye protection. Hospitals should have the patient wear a surgical mask to decrease the spread to personnel.